Improvement in spring-hinges



A side when the butt is in place.

UNITED STATES PATENT EEicE.

AND JAMES MOMEEHAN, OF SAME PLACE. o p

IMPROVEMENT IN SPRING-HINGES.

Specification forming part of Letters Patent N0. 104,252, dated June 14,1870.

To all whom, it may concern.:

Be it known that I, JAMES BTDWELL, of the city and county of SanFrancisco, State of California, have invented an Improved DoubleReversible Door-Butt; and I do hereby declare the following descriptionand accompa` nying drawing are sufcien't to enable any person skilled inthe art or science to which it most nearly appertains to make and use mysaid invention or improvements without further invention or experiment.

v My invention relates to a double door-butt, allowing the door to openeither way; and it consists in'combining upon each edge of one platerecessed flanged thimbles with hollow slotted knuckles, and these againwith solid knuckles and bars on the opposite plate, said bars enteringthe aforesaid knuckles and thimbles, as will be fully set forth below.

In order to more fully illustrate my invention, reference is had to theaccompanying drawing, forming a part of this specification, in which- Arepresents one of the leaves or plates of my door-butt, which is securedto the edge of the door. This plate is of sufficient width to extendacross from side to side of the door, and has small flanges a, extendingat right angles to it, and which clasp the door upon each On each sideof this plate are formed one or more solid cylindrical knuckles, b' b,placed a short distance apart along the side, and having aconnectingbar, cl, uniting them together at about their centers. Thisbar, as shown in the present drawing, is wedge-shaped; but it is evidentthat other shapes would answer the same purpose. The plate or leat`B issecured to the door-casing opposite the plate A and :in the same manner.The knuckles g g on the opposite ends of this plate are made of thesaine form as the knuckles bon the plate A, but are hollow, and have abushing, D, placed loosely in them. This bushing has a small flange, h,around its upper rim, which rests -upon the `hollow knuckle, andprevents its falling out. It can also, ifdesired, be secured at theopposite end by some suitable device. The knuckles g have each anopening, i, cut out from one side, and the bushings D have also awedge-shaped recess, i", cut/l in them, so that when the bushing standsin such a position that the cut t is opposite the out t' inthe cylinderthe wedgeshaped bars d of the plate A will enter the cut, and thus forma continnous knuckle'or hinge-joint and bring the two plates closetogether.

A hollow barrel or cylinder, E, is cast with each of the plates standingat right'angles with it and upon the outside or side next the wood-work,so as to be sunk both in the casing and in the door. A circular hole isalso left in the center of the leaves. A strong spiral or other spring,F, is secured at the outer end of each of these barrels, and passesthrough the two plates, and thus serves to keep the door closed.

When the door is opened to either side the sition to receive the barsagain when the door l.

closes.

One knuckle and one bushing may be used, the lower end of the bushingforming an ornament, as shown at M, and having a screw and nut. A rubberor other elastic washer is held by this nut and kprevents the bushingsbeing easily turned.

A double reversible doorbutt constructed in this manner will be quiteeffective for the purpose for which it is intended, and will present aneat appearance, as the door-spring l and butt are both connected in acompact manner.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, isl l. In combination with the hollow slottedknuckles g, the loose flanged bushing or thimble D, provided with arecess. @substantially as and for the purpose set forth.

2. The combination, with the elements of the above claim, of theknuckles b and bars d, constructed and arranged to operate substantiallyas described. v

In witness whereof I have hereunto set my hand and seal.

JAMES BIDVELL. [n s] Witnesses:

JAMES MCIWIEEHAN, J. L. BOONE.`

